scholarly journals Data for 3D printing enlarged museum specimens for the visually impaired

Gigabyte ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Anton du Plessis ◽  
Johan Els ◽  
Stephan le Roux ◽  
Muofhe Tshibalanganda ◽  
Toni Pretorius
Keyword(s):  
3D Printing ◽  
Visually Impaired ◽  
New Technologies ◽  
Museum Specimens ◽  
Micro Computed Tomography ◽  
The Public ◽  
Interactive Exhibits ◽  
3D Printed ◽  
Scan Data ◽  
Selection Of

Museums are embracing new technologies and one of these is the use of 3D printing. 3D printing allows for creating physical replicas of items which may, due to great value or significance, not be handled by the public, or which are too small or fragile to be handled or even seen with the naked eye. One such application of new technologies has been welcomed by the National Museum in Bloemfontein, Free State, South Africa. Here, blown-up (enlarged) Museum specimens were 3D printed for various interactive exhibits that are aimed at increasing the accessibility of their permanent displays for visually impaired visitors who rely greatly on touch as a source of observation. A selection of scorpions, pseudoscorpions, mites and archetypal bird skulls were scanned, processed and 3D printed to produce enlarged, highly functional nylon models. This data paper provides the raw micro Computed Tomography (micro-CT) scan data and print ready STL files processed from this data. The STL files may be used in their current format and details of the printing are provided.

scholarly journals Data for 3D printing enlarged museum specimens for the visually impaired

2020 ◽  
Author(s):  
Anton du Plessis ◽  
Johan Els ◽  
Stephan le Roux ◽  
Muofhe Tshibalanganda ◽  
Toni Pretorius
Keyword(s):  
3D Printing ◽  
Visually Impaired ◽  
New Technologies ◽  
Museum Specimens ◽  
Micro Computed Tomography ◽  
The Public ◽  
Interactive Exhibits ◽  
3D Printed ◽  
Scan Data ◽  
Selection Of

Museums are embracing new technologies and one of these is the use of 3D printing. 3D printing allows for creating physical replicas of items which may, due to great value or significance, not be handled by the public, or which are too small or fragile to be handled or even seen with the naked eye. One such application of new technologies has been welcomed by the National Museum in Bloemfontein, Free Sate, South Africa. Here, blown-up (enlarged) Museum specimens were 3D printed for various interactive exhibits that are aimed at increasing the accessibility of their permanent displays for visually impaired visitors who rely greatly on touch as a source of observation. A selection of scorpions, pseudoscorpions, mites and archetypal bird skulls were scanned, processed and 3D printed to produce enlarged, highly functional nylon models. This data paper provides the raw micro Computed Tomography (micro-CT) scan data and print ready STL files processed from this data. The STL files may be used in their current format and details of the printing are provided.

scholarly journals 3D Printing of Thermo-Sensitive Drugs

Pharmaceutics ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1524
Author(s):  
Sadikalmahdi Abdella ◽  
Souha H. Youssef ◽  
Franklin Afinjuomo ◽  
Yunmei Song ◽  
Paris Fouladian ◽  
...  
Keyword(s):  
3D Printing ◽  
Three Dimensional ◽  
Fused Deposition Modelling ◽  
Future Directions ◽  
Digital Light Processing ◽  
Fused Deposition ◽  
Printing Technique ◽  
3D Printed ◽  
Semi Solid ◽  
Selection Of

Three-dimensional (3D) printing is among the rapidly evolving technologies with applications in many sectors. The pharmaceutical industry is no exception, and the approval of the first 3D-printed tablet (Spiratam®) marked a revolution in the field. Several studies reported the fabrication of different dosage forms using a range of 3D printing techniques. Thermosensitive drugs compose a considerable segment of available medications in the market requiring strict temperature control during processing to ensure their efficacy and safety. Heating involved in some of the 3D printing technologies raises concerns regarding the feasibility of the techniques for printing thermolabile drugs. Studies reported that semi-solid extrusion (SSE) is the commonly used printing technique to fabricate thermosensitive drugs. Digital light processing (DLP), binder jetting (BJ), and stereolithography (SLA) can also be used for the fabrication of thermosensitive drugs as they do not involve heating elements. Nonetheless, degradation of some drugs by light source used in the techniques was reported. Interestingly, fused deposition modelling (FDM) coupled with filling techniques offered protection against thermal degradation. Concepts such as selection of low melting point polymers, adjustment of printing parameters, and coupling of more than one printing technique were exploited in printing thermosensitive drugs. This systematic review presents challenges, 3DP procedures, and future directions of 3D printing of thermo-sensitive formulations.

scholarly journals Design and manufacture of artificial organs made of polymers

2019 ◽  
Vol 254 ◽  
pp. 06006 ◽  
Author(s):  
Marek Macko ◽  
Zbigniew Szczepański ◽  
Dariusz Mikołajewski ◽  
Joanna Nowak ◽  
Emilia Mikołajewska ◽  
...  
Keyword(s):  
Clinical Practice ◽  
3D Printing ◽  
New Technologies ◽  
Medical Training ◽  
Artificial Organs ◽  
Medical Applications ◽  
Surgical Operation ◽  
Design And Manufacture ◽  
Further Development ◽  
Selection Of

New technologies such as 3D printing and reverse engineering are becoming increasingly popular, including in medical applications. The paper presents possible ways to use 3D printing in the area of increasing the level of medical training specialists in their daily clinical practice and in the selection of the appropriate scenario before a real surgical operation. Descriptions of the projects carried out with the surgeons aimed at achieving the aforementioned goals were presented. The presented concepts are relatively new solutions, but their further development may lead to the extension of the field of application of these techniques in medicine, among others in relation to other specialties.

scholarly journals 3D Printing of Alginate-Natural Clay Hydrogel-Based Nanocomposites

Gels ◽  
2021 ◽  
Vol 7 (4) ◽  
pp. 211
Author(s):  
Rebeca Leu Leu Alexa ◽  
Raluca Ianchis ◽  
Diana Savu ◽  
Mihaela Temelie ◽  
Bogdan Trica ◽  
...  
Keyword(s):  
3D Printing ◽  
Composite Scaffold ◽  
Infrared Spectrometry ◽  
Micro Computed Tomography ◽  
Buffer Solution ◽  
Nanocomposite Hydrogels ◽  
Crosslinking Process ◽  
Type Selection ◽  
Biological Studies ◽  
3D Printed

Biocompatibility, biodegradability, shear tinning behavior, quick gelation and an easy crosslinking process makes alginate one of the most studied polysaccharides in the field of regenerative medicine. The main purpose of this study was to obtain tissue-like materials suitable for use in bone regeneration. In this respect, alginate and several types of clay were investigated as components of 3D-printing, nanocomposite inks. Using the extrusion-based nozzle, the nanocomposites inks were printed to obtain 3D multilayered scaffolds. To observe the behavior induced by each type of clay on alginate-based inks, rheology studies were performed on composite inks. The structure of the nanocomposites samples was examined using Fourier Transform Infrared Spectrometry and X-ray Diffraction (XRD), while the morphology of the 3D-printed scaffolds was evaluated using Electron Microscopy (SEM, TEM) and Micro-Computed Tomography (Micro-CT). The swelling and dissolvability of each composite scaffold in phosfate buffer solution were followed as function of time. Biological studies indicated that the cells grew in the presence of the alginate sample containing unmodified clay, and were able to proliferate and generate calcium deposits in MG-63 cells in the absence of specific signaling molecules. This study provides novel information on potential manufacturing methods for obtaining nanocomposite hydrogels suitable for 3D printing processes, as well as valuable information on the clay type selection for enabling accurate 3D-printed constructs. Moreover, this study constitutes the first comprehensive report related to the screening of several natural clays for the additive manufacturing of 3D constructs designed for bone reconstruction therapy.

scholarly journals Paediatric Orthopaedic Surgery with 3D Printing: Improvements and Cost Reduction

Symmetry ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1317 ◽  
Author(s):  
Frizziero ◽  
Santi ◽  
Liverani ◽  
Giuseppetti ◽  
Trisolino ◽  
...  
Keyword(s):  
3D Printing ◽  
Traditional Method ◽  
New Technologies ◽  
Healthcare Services ◽  
Clinical Phase ◽  
Critical Issues ◽  
3D Printed ◽  
Alternative Methodology ◽  
Reducing Costs ◽  
Paediatric Orthopaedic

This paper presents a a novel alghorithm of diagnosis and treatment of rigid flatfoot due to tarsal coalition. It introduces a workflow based on 3D printed models, that ensures more efficiency, not only by reducing costs and time, but also by improving procedures in the preoperative clinical phase. Since this paper concerns the development of a new methodology that integrates both engineering and medical fields, it highlights symmetry. An economic comparison is made between the traditional method and the innovative one; the results demonstrate a reduction in costs with the latter. The current, traditional method faces critical issues in diagnosing the pathologies of a limb (such as the foot) and taking decisions for further treatment of the same limb. The proposed alternative methodology thus uses new technologies that are part of the traditional workflow, only replacing the most obsolete ones. In fact, it is increasingly becoming necessary to introduce new technologies in orthopedics, as in other areas of medicine, to offer improved healthcare services for patients. Similar clinical treatments can be performed using the aforementioned technologies, offering greater effectiveness, more simplicity of approach, shorter times, and lower costs. An important technology that fits into this proposed methodology is 3D printing.

scholarly journals Post-3D printing modification for improved biomedical applications

2017 ◽  
Vol 3 (2) ◽  
Author(s):  
Yi Zhang
Keyword(s):  
3D Printing ◽  
Surface Functionalization ◽  
Biomedical Applications ◽  
Printing Technology ◽  
3D Printing Technology ◽  
3D Printed ◽  
Selection Of

3D printing is a technology well-suited for biomedical applications due to its ability to create highly complex and arbitrary structures from personalized designs with fast turnaround. However, due to limited selection of 3D-printable materials, the biofunctionality of many 3D-printed components has not been paid enough attention. In this perspective, we point out that post-3D printing modification is the solution that could close the gap between 3D printing technology and requirements of biomedical applications. We identify architectural reconfiguration and surface functionalization as the two main post-3D printing modification processes and discuss potential techniques for post-3D printing modification to achieve desired biofunctionality.

scholarly journals Comparing Properties of Variable Pore-Sized 3D-Printed PLA Membrane with Conventional PLA Membrane for Guided Bone/Tissue Regeneration

Materials ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1718 ◽  
Author(s):  
Hao Yang Zhang ◽  
Heng Bo Jiang ◽  
Jeong-Hyun Ryu ◽  
Hyojin Kang ◽  
Kwang-Mahn Kim ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
3D Printing ◽  
Bone Tissue Regeneration ◽  
Control Group ◽  
Micro Computed Tomography ◽  
Barrier Membranes ◽  
Pore Sizes ◽  
Small Pore ◽  
Superior Mechanical Properties ◽  
3D Printed

The aim of this study was to fabricate bioresorbable polylactide (PLA) membranes by 3D printing and compare their properties to those of the membranes fabricated by the conventional method and compare the effect of different pore sizes on the properties of the 3D-printed membranes. PLA membranes with three different pore sizes (large pore-479 μm, small pore-273 μm, and no pore) were 3D printed, and membranes fabricated using the conventional solvent casting method were used as the control group. Scanning electron microscopy (SEM) and micro-computed tomography (µ-CT) were taken to observe the morphology and obtain the porosity of the four groups. A tensile test was performed to compare the tensile strength, elastic modulus, and elongation at break of the membranes. Preosteoblast cells were cultured on the membranes for 1, 3 and 7 days, followed by a WST assay and SEM, to examine the cell proliferation on different groups. As a result, the 3D-printed membranes showed superior mechanical properties to those of the solvent cast membranes, and the 3D-printed membranes exhibited different advantageous mechanical properties depending on the different pore sizes. The various fabrication methods and pore sizes did not have significantly different effects on cell growth. It is proven that 3D printing is a promising method for the fabrication of customized barrier membranes used in GBR/GTR.

Case Illustrations of 3D Printing in Brazilian Schools and Community

2019 ◽  
pp. 158-175
Author(s):  
Manuel Marcos Maciel Formiga ◽  
Marcondes Moreira De Araujo ◽  
Ieda M. Santos
Keyword(s):  
3D Printing ◽  
Visually Impaired ◽  
Future Research ◽  
3D Printer ◽  
International Literature ◽  
Research Projects ◽  
Community Based ◽  
Extra Curricular Activities ◽  
3D Printed ◽  
Visually Impaired Students

This chapter discusses 3D printing technologies in Brazilian schools through analysis of selected cases including one case implemented in the community with implications to schools. A description of the methodology and review of the cases are presented. Analysis is supported by international literature to enrich the review and compare how the field is evolving in the country. Results indicate that students and teachers are predominantly experiencing 3D printing via extra-curricular activities supported by research projects implemented outside the schools. On the other hand, the Lite Maker project made it possible to bring a 3D printer to schools. The community-based project illustrates how 3D printed objects can support visually impaired students. 3D printing technology is moving slowly into the mainstream of Brazilian educational landscape. However, schools will increase access to this technology as printers and its accessories become more affordable. Implications for practice and future research are discussed.

scholarly journals Accuracy of CAD/CAM-fabricated bite splints: milling vs 3D printing

2020 ◽  
Vol 24 (12) ◽  
pp. 4607-4615 ◽  
Author(s):  
Reymus Marcel ◽  
Hickel Reinhard ◽  
Keßler Andreas
Keyword(s):  
3D Printing ◽  
Univariate Analysis ◽  
Vertical Position ◽  
Cnc Milling ◽  
Software Applications ◽  
Cad Cam ◽  
Deviation Measurement ◽  
Kolmogorov Smirnov ◽  
3D Printed ◽  
Selection Of

Abstract Objectives The aim of this study was to investigate the accuracy of CAD/CAM-fabricated bite splints in dependence of fabrication method (milling vs 3D printing), positioning (horizontal vs vertical), selection of material, and method of deviation measurement. Materials and methods Bite splints were 3D-printed in either horizontal or vertical position (n = 10) using four different resins (Dental LT, Ortho Clear, Freeprint Splint, V-Splint). As control, ten bite splints were fabricated by CNC milling (ProArt CAD Splint). The splints were scanned and deviations between the CAD-file (trueness) and between each other within one group (precision) were measured by two different software applications and methods (cloud-to-cloud vs cloud-to-mesh). Data were analyzed using univariate analysis, Kolmogorov-Smirnov, Kruskal-Wallis, and Mann-Whitney U tests. Results The highest impact on accuracy was exerted by the selection of the material (trueness: ηP2 = 0.871, P < 0.001; precision: ηP2 = 0.715, P < 0.001). Milled splints showed the highest trueness (P < 0.01) but not the highest precision at the same time. Horizontally positioned 3D-printed bite splints showed the least deviations in terms of trueness while vertical positioning resulted in the highest precision. The cloud-to-cloud method showed higher measured deviations than the other methods (P < 0.001–P = 0.002). Conclusion Milled splints show higher trueness than 3D-printed ones, while the latter reveal higher reproducibility. The calculated deviations vary according to the measurement method used. Clinical relevance In terms of accuracy, milled and 3D-printed bite splints seem to be of equal quality.

scholarly journals Materials Testing for the Development of Biocompatible Devices through Vat-Polymerization 3D Printing

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1788
Author(s):  
Gustavo González ◽  
Désirée Baruffaldi ◽  
Cinzia Martinengo ◽  
Angelo Angelini ◽  
Annalisa Chiappone ◽  
...  
Keyword(s):  
3D Printing ◽  
Health Sector ◽  
Materials Testing ◽  
A549 Cell Line ◽  
Digital Light Processing ◽  
Biological Studies ◽  
3D Printed ◽  
High Flexibility ◽  
Printing Techniques ◽  
Selection Of

Light-based 3D printing techniques could be a valuable instrument in the development of customized and affordable biomedical devices, basically for high precision and high flexibility in terms of materials of these technologies. However, more studies related to the biocompatibility of the printed objects are required to expand the use of these techniques in the health sector. In this work, 3D printed polymeric parts are produced in lab conditions using a commercial Digital Light Processing (DLP) 3D printer and then successfully tested to fabricate components suitable for biological studies. For this purpose, different 3D printable formulations based on commercially available resins are compared. The biocompatibility of the 3D printed objects toward A549 cell line is investigated by adjusting the composition of the resins and optimizing post-printing protocols; those include washing in common solvents and UV post-curing treatments for removing unreacted and cytotoxic products. It is noteworthy that not only the selection of suitable materials but also the development of an adequate post-printing protocol is necessary for the development of biocompatible devices.

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